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Nano Research 2014, 7(4): 572-578 https://doi.org/10.1007/s12274-014-0425-z
Research Article | Issue | Published: 01 April 2014

Folded MoS2 layers with reduced interlayer coupling

Show Author's Information Andres Castellanos-Gomez1( ),  Herre S. J. van der Zant1,  Gary A. Steele1
Kavli Institute of Nanoscience Delft University of Technology, 2628 CJDelft The Netherlands
Keywords:
photoluminescence, Raman spectroscopy, molybdenum disulfide (MoS2), interlayer coupling, folded MoS2, twisted MoS2
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Castellanos-Gomez A, van der Zant HSJ, Steele GA. Folded MoS2 layers with reduced interlayer coupling. Nano Research, 2014, 7(4): 572-578. https://doi.org/10.1007/s12274-014-0425-z
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Abstract Full text Electronic supplementary material About this article

We study molybdenum disulfide (MoS2) structures generated by folding single-layer and bilayer MoS2 flakes. We find that this modified layer stacking leads to a decrease in the interlayer coupling and an enhancement of the photoluminescence emission yield. We additionally find that folded single-layer MoS2 structures show a contribution to photoluminescence spectra of both neutral and charged excitons, which is a characteristic feature of single-layer MoS2 that has not been observed in multilayer MoS2. The results presented here open the door to fabrication of multilayered MoS2 samples with high optical absorption while maintaining the advantageous enhanced photoluminescence emission of single-layer MoS2 by controllably twisting the MoS2 layers.


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About this article

Folded MoS2 layers with reduced interlayer coupling

Show Author's information Andres Castellanos-Gomez1( ), Herre S. J. van der Zant1, Gary A. Steele1
Kavli Institute of Nanoscience Delft University of Technology, 2628 CJDelft The Netherlands

Abstract

We study molybdenum disulfide (MoS2) structures generated by folding single-layer and bilayer MoS2 flakes. We find that this modified layer stacking leads to a decrease in the interlayer coupling and an enhancement of the photoluminescence emission yield. We additionally find that folded single-layer MoS2 structures show a contribution to photoluminescence spectra of both neutral and charged excitons, which is a characteristic feature of single-layer MoS2 that has not been observed in multilayer MoS2. The results presented here open the door to fabrication of multilayered MoS2 samples with high optical absorption while maintaining the advantageous enhanced photoluminescence emission of single-layer MoS2 by controllably twisting the MoS2 layers.

Keywords: photoluminescence, Raman spectroscopy, molybdenum disulfide (MoS2), interlayer coupling, folded MoS2, twisted MoS2

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Publication history
Copyright
Acknowledgements

Publication history

Received: 17 September 2013
Revised: 21 January 2014
Accepted: 29 January 2014
Published: 01 April 2014
Issue date: April 2014

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

The authors would like to acknowledge fruitful discussions with J. Fernández-Rossier (INL, Portugal), A.C. Ferrari, R. S. Sundaram (Cambridge University, UK), R. Roldán, P. San-Jose (ICMM-CSIC, Spain) and E. Prada (Universidad Autonoma de Madrid). This work was supported by the European Union (FP7) through the program RODIN. A. C. -G. acknowledges financial support through the FP7-Marie Curie Project PIEF-GA-2011-300802 (STRENGTHNANO).

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